Reinstalling Windows from the BIOS might sound like a tech challenge, but it’s easier than you think. First, you’ll need a bootable USB with Windows on it. Next, you’ll access the BIOS on your computer. Once inside, you’ll change the boot order so your computer starts from the USB. Follow the prompts to reinstall Windows, and soon enough, your computer will be fresh and ready to go. Let’s dive into the detailed steps!
How to reinstall Windows from the BIOS
Let’s walk through how to reinstall Windows from BIOS. These steps will help you set up a fresh Windows installation on your computer.
Step 1: Create a Bootable USB
Ensure you have a bootable USB drive with the Windows installation files.
You’ll need a USB drive with at least 8GB of storage. Use a tool like the Windows Media Creation Tool to download and set up the Windows installation files.
Step 2: Access the BIOS
Restart your computer and press the designated key (like F2, F10, or Delete) to enter the BIOS settings.
The key varies by manufacturer and will usually be displayed briefly on the startup screen. If you miss it, restart and try again.
Step 3: Change the Boot Order
In the BIOS, navigate to the Boot tab and set the USB drive as the first boot device.
This tells your computer to load the Windows installer from the USB instead of your hard drive. Save changes before exiting the BIOS.
Step 4: Begin Windows Installation
Save and exit the BIOS, and your PC will boot from the USB. Follow the on-screen instructions to install Windows.
You’ll be guided through language settings and partition choices. Be sure to back up any important data beforehand, as reinstalling will wipe your drive.
Drive not showing in setup? See adding drivers to a Windows 11 USB.
Step 5: Complete Installation
Follow the prompts to finish the installation and set up Windows.
After installation, you’ll configure settings like time zone and create a user account. Your computer will restart several times during this process.
Once you’ve completed these steps, your computer will have a fresh installation of Windows. Enjoy the benefits of a clean, fast system!
Before you wipe the drive
- Make sure to back up important files before reinstalling Windows.
- Ensure your USB drive is formatted correctly and contains the right installation files.
- Keep your Windows product key handy, as you might need it during installation.
- Be aware of the specific BIOS key for your computer model.
- Consider updating your BIOS before reinstalling Windows for better compatibility.
Common questions about a BIOS reinstall
What if I can’t access the BIOS?
Check your computer’s manual or manufacturer’s website for the correct key to enter the BIOS. Sometimes, it’s about timing!
Do I need to reinstall drivers?
After reinstalling Windows, you may need to update or reinstall drivers. Windows Update can help with this.
Can I reinstall Windows without losing files?
A clean install will erase files. Consider using the “Keep my files” option during installation if available.
How long does the Windows installation take?
The installation process can take between 20 minutes to an hour, depending on your hardware.

Kermit Matthews runs Live2Tech from just outside Philadelphia. He is an IT specialist with over 20 years of experience, from a university help desk to small-business IT, IT management and his own consulting practice, and has written tech guides full time since 2020. Steps are checked against the current software on a real device or the maker’s official documentation. More about Kermit.